Keith Rowley, I've marked David Lyons's response as the "Correct Answer" because the link he has provided indicates that this is both a deliberate design decision and under continuing review by the Canvas design team. For future reference, if you ever suspect anything in Canvas is a bug, the best course of action is to submit a help ticket, as that will enable Canvas to collect evidence across multiple instances, users, and courses, that they can then use to evaluate a given situation.